resources

Defines application-scoped resources for an enterprise application,
web module, EJB module, connector module, or application client module.
This is the root element; there can only be one resources element
in a sun-resources.xml file. See The sun-resources.xml File.

Note –

You must specify a Java Naming and Directory
InterfaceTM (JNDI) name for each resource. To avoid collisions
with names of other enterprise resources in JNDI, and to avoid portability
problems, all names in a GlassFish Server application should begin with
the string java:app/.